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Old 09-14-2011, 01:00 AM   #4
74 stepside
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Join Date: Oct 2009
Location: SoCal
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Re: 454 Problems =(=(=(

Some of those BBCs had plastic teeth on the timing gears. Might cause it to jump out of time if the teeth are bad or chain is stretched. Had a SBC act the same as yours because it had a couple bad lifters too. Just keep checking. Vacuum test might help.
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